Relationships among xylem transport, biomechanics and storage in stems and roots of nine Rhamnaceae species of the California chaparral.

Here, hypotheses about stem and root xylem structure and function were assessed by analyzing xylem in nine chaparral Rhamnaceae species. Traits characterizing xylem transport efficiency and safety, mechanical strength and storage were analyzed using linear regression, principal components analysis and phylogenetic independent contrasts (PICs). Stems showed a strong, positive correlation between xylem mechanical strength (xylem density and modulus of rupture) and xylem transport safety (resistance to cavitation and estimated vessel implosion resistance), and this was supported by PICs. Like stems, greater root cavitation resistance was correlated with greater vessel implosion resistance; however, unlike stems, root cavitation resistance was not correlated with xylem density and modulus of rupture. Also different from stems, roots displayed a trade-off between xylem transport safety from cavitation and xylem transport efficiency. Both stems and roots showed a trade-off between xylem transport safety and xylem storage of water and nutrients, respectively. Stems and roots differ in xylem structural and functional relationships, associated with differences in their local environment (air vs soil) and their primary functions.

[1]  J. Sperry,et al.  LIFE HISTORY TYPE AND WATER STRESS TOLERANCE IN NINE CALIFORNIA CHAPARRAL SPECIES (RHAMNACEAE) , 2007 .

[2]  F. Ewers,et al.  CAVITATION RESISTANCE AMONG 26 CHAPARRAL SPECIES OF SOUTHERN CALIFORNIA , 2007 .

[3]  K. Esler,et al.  Xylem density, biomechanics and anatomical traits correlate with water stress in 17 evergreen shrub species of the Mediterranean‐type climate region of South Africa , 2007 .

[4]  E. Edwards.  Correlated evolution of stem and leaf hydraulic traits in Pereskia (Cactaceae). , 2006, The New phytologist.

[5]  W. Cornwell,et al.  Wood density and vessel traits as distinct correlates of ecological strategy in 51 California coast range angiosperms. , 2006, The New phytologist.

[6]  J. Sperry,et al.  Scaling of angiosperm xylem structure with safety and efficiency. , 2006, Tree physiology.

[7]  R. B. Jackson,et al.  Functional coordination between leaf gas exchange and vulnerability to xylem cavitation in temperate forest trees. , 2006, Plant, cell & environment.

[8]  R. Pratt,et al.  Do Invasive Trees have a Hydraulic Advantage over Native Trees? , 2006, Biological Invasions.

[9]  William A. Paddock,et al.  Do Xylem Fibers Affect Vessel Cavitation Resistance?1 , 2005, Plant Physiology.

[10]  F. Ewers,et al.  Mechanisms for tolerating freeze-thaw stress of two evergreen chaparral species: Rhus ovata and Malosma laurina (Anacardiaceae). , 2005, American journal of botany.

[11]  J. Sperry,et al.  Inter‐vessel pitting and cavitation in woody Rosaceae and other vesselled plants: a basis for a safety versus efficiency trade‐off in xylem transport , 2005 .

[12]  N. Holbrook,et al.  Water Stress Deforms Tracheids Peripheral to the Leaf Vein of a Tropical Conifer1 , 2005, Plant Physiology.

[13]  F. Meinzer,et al.  Structure-Function Relationships in Sapwood Water Transport and Storage , 2005 .

[14]  Robert B. Jackson,et al.  ADAPTIVE VARIATION IN THE VULNERABILITY OF WOODY PLANTS TO XYLEM CAVITATION , 2004 .

[15]  B. Oxelman,et al.  Generic limits in Rhamnus L. s.l. (Rhamnaceae) inferred from nuclear and chloroplast DNA sequence phylogenies , 2004 .

[16]  D. Ackerly,et al.  Adaptation, Niche Conservatism, and Convergence: Comparative Studies of Leaf Evolution in the California Chaparral , 2004, The American Naturalist.

[17]  S. Mayr,et al.  Xylem Wall Collapse in Water-Stressed Pine Needles , 2004, Plant Physiology.

[18]  Jörg J. Sauter,et al.  Storage, mobilization and interrelations of starch, sugars, protein and fat in the ray storage tissue of poplar trees , 1994, Trees.

[19]  D. Ackerly,et al.  Hydraulic architecture and the evolution of shoot allometry in contrasting climates. , 2003, American journal of botany.

[20]  J. Sperry,et al.  Tracheid diameter is the key trait determining the extent of freezing-induced embolism in conifers. , 2003, Tree physiology.

[21]  D. Ackerly.  Community Assembly, Niche Conservatism, and Adaptive Evolution in Changing Environments , 2003, International Journal of Plant Sciences.

[22]  F. Ewers,et al.  Hydraulic, biomechanical, and anatomical interactions of xylem from five species of Acer (Aceraceae). , 2003, American journal of botany.

[23]  S. Schultz.  Sexual Dimorphism in Gynodioecious Sidalcea hirtipes (Malvaceae). I. Seed, Fruit, and Ecophysiology , 2003, International Journal of Plant Sciences.

[24]  B. Choat,et al.  Pit Membrane Porosity and Water Stress-Induced Cavitation in Four Co-Existing Dry Rainforest Tree Species , 2003, Plant Physiology.

[25]  D. Ackerly.  TAXON SAMPLING, CORRELATED EVOLUTION, AND INDEPENDENT CONTRASTS , 2000, Evolution; international journal of organic evolution.

[26]  D. Soltis,et al.  Diversification of the North American shrub genus Ceanothus (Rhamnaceae): conflicting phylogenies from nuclear ribosomal DNA and chloroplast DNA. , 2000, American journal of botany.

[27]  J. Sperry,et al.  Drought experience and cavitation resistance in six shrubs from the Great Basin, Utah , 2000 .

[28]  G. Goldstein,et al.  Stem water storage capacity and efficiency of water transport: their functional significance in a Hawaiian dry forest , 2000 .

[29]  S. Stafford,et al.  Multivariate Statistics for Wildlife and Ecology Research , 2000, Springer New York.

[30]  J. Sperry,et al.  The relationship between xylem conduit diameter and cavitation caused by freezing. , 1999, American journal of botany.

[31]  K J Niklas,et al.  The mechanical role of bark. , 1999, American journal of botany.

[32]  F. Ewers,et al.  Differential susceptibility to xylem cavitation among three pairs of Ceanothus species in the Transverse Mountain Ranges of southern California , 1999 .

[33]  F. Ewers,et al.  Conduit diameter and drought‐induced embolism in Salvia mellifera Greene (Labiatae) , 1994 .

[34]  J. C. Hickman,et al.  The Jepson Manual: Higher Plants of California , 1993 .

[35]  T. Garland,et al.  PHYLOGENETIC ANALYSES OF THE CORRELATED EVOLUTION OF CONTINUOUS CHARACTERS: A SIMULATION STUDY , 1991, Evolution; international journal of organic evolution.

[36]  P. Martins.  CONTINUOUS CHARACTERS: A SIMULATION STUDY , 1991 .

[37]  J. Felsenstein.  Phylogenies and the Comparative Method , 1985, The American Naturalist.

[38]  Thomas E. McLain,et al.  Quantitative wood anatomy-relating anatomy to transverse tensile strength , 2007 .

[39]  M. Zimmermann.  Xylem Structure and the Ascent of Sap , 1983, Springer Series in Wood Science.

[40]  Paul J. Kramer,et al.  Physiology of Woody Plants , 1983 .

[41]  Richard H. Waring,et al.  Sapwood water storage: its contribution to transpiration and effect upon water conductance through the stems of old‐growth Douglas‐fir , 1978 .

[42]  S. Carlquist.  ECOLOGICAL FACTORS IN WOOD EVOLUTION: A FLORISTIC APPROACH , 1977 .

[43]  H. Lyr,et al.  The physiology of woody plants. , 1967 .

[44]  A. ALLSOPP,et al.  Plant Anatomy , 1966, Nature.

[45]  H. Hellmers,et al.  Root Systems of Some Chaparral Plants in Southern California , 1955 .

[46]  H. Desch.  Timber; its structure and properties , 1948 .

[47]  T. Just,et al.  Ceanothus. Part I, Ceanothus for Gardens, Parks and Roadsides.@@@Ceanothus. Part II, A Systematic Study of the Genus Ceanothus. , 1944 .

[48]  A. Moody,et al.  Distribution of plant life history types in California chaparral : the role of topographically-determined drought severity , 2022 .